onsider a simple capacitive touch sensor comprised of a resistor with resistance R=1.57 MΩ and a capacitor with capacitance C=1.09 nF connected in series. A standard wall outlet powers the sensor with an output frequency f=50.0 Hz. Pressing the sensor triples the capacitance of the circuit. A logic gate detects a change in the circuit's impedance.

Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter33: Alternating Current Circuits
Section: Chapter Questions
Problem 33.59AP: Review. The voltage phasor diagram for a certain series RLC circuit is shown in Figure P33.59. The...
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Nowadays, touch screen devices are everywhere.

Consider a simple capacitive touch sensor comprised of a resistor with resistance R=1.57 MΩ and a capacitor with capacitance C=1.09 nF connected in series. A standard wall outlet powers the sensor with an output frequency f=50.0 Hz. Pressing the sensor triples the capacitance of the circuit. A logic gate detects a change in the circuit's impedance.

Determine the initial impedance Z0 of the circuit in megaohms (MΩ).

 

Determine the impedance Zp of the circuit with a pressed sensor in megaohms (MΩ).

 

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